I have some video files that play fine with 180.35 driver (using VDPAU) but not with higher version (I have tested with 180.37, 180.41, 185.13), If I try to play the file with those driver, then the system get very slow then the screen hangs, though the system still runs (I still can use my power button). If I close mplayer fast enough then I still can use the computer, but then i had graphic corruptions everywhere. (This mean buffer overflow?)